It's been many years since I read this but I recall it clearly. A promising young Senator finds himself obliged to put his future on the line when he realises that the popular President may be suffering a mental breakdown.

Some good discussion of the Constitutional issues, especially with t regard to the shortcomings of the 25th Amendment in dealing with anything as complex as a mental ailment. Perhaps events of the last couple of years have brought it back to my mind.

Only criticism is that the ending is a little too pat. They get rid of Hollenbach altogether too easily. I'm pretty sure that had a real paranoid found a bunch of pols discussing how to remove him from office, his reaction would have been altogether different. But don't let that spoil it for you. It's still well worth a read.